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Finding the Fourth Proportional to 398,747.50, 550,263.99 and 217,460.86

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Solution

The fourth proportional to 398,747.50, 550,263.99 and 217,460.86 is: 300,091.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,747.50 : 550,263.99 = 217,460.86 : x
  2. Step 2: Convert to fraction form
    398,747.50/550,263.99 = 217,460.86/x
  3. Step 3: Cross multiply
    398,747.50x = 550,263.99 × 217,460.86
  4. Step 4: Simplify right side
    398,747.50x = 119,660,880,492.43
  5. Step 5: Solve for x
    x = 119,660,880,492.43/398,747.50
  6. Step 6: Final answer
    x = 300,091.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.